Difference between revisions of "PPOD-mini Project"
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The goal of this project was to create a miniature, simplified version of the PPOD (Programmable Part-feeding Oscillatory Device) that is currently in the Laboratory for Intelligent Mechanical Systems. This smaller model needed to be easily transportable so that it could be taken to various locations and shown to different groups. The PPOD is a device that is able to manipulate parts placed on it by creating a velocity field that is dependent on the phases and amplitudes of the speakers that are connected to the platform. More information on the original PPOD and related research can be found at the [http://lims.mech.northwestern.edu/projects/frictioninducedforcefields/index.htm LIMS website]. |
The goal of this project was to create a miniature, simplified version of the PPOD (Programmable Part-feeding Oscillatory Device) that is currently in the Laboratory for Intelligent Mechanical Systems. This smaller model needed to be easily transportable so that it could be taken to various locations and shown to different groups. The PPOD is a device that is able to manipulate parts placed on it by creating a velocity field that is dependent on the phases and amplitudes of the speakers that are connected to the platform. More information on the original PPOD and related research can be found at the [http://lims.mech.northwestern.edu/projects/frictioninducedforcefields/index.htm LIMS website]. |
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=Physical Construction= |
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==Base== |
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The base for the PPOD-mini is constructed out of acrylic sheets that are approximately 0.22" thick. Each section was designed in AutoCad and then transferred to the [[Laser cutter]] to be created. The sections were designed with a jigsaw pattern on the edges so they would fit together tightly and could be placed exactly where desired. The dimension of the base are 10" x 10" x 3.5". The goal was to keep it as small as possible while still making it functional, this width was required to fit all of the speakers and the height was necessary for the power supplies to fit in the enclosed space. |
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==Speaker Mounts== |
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Six speaker mounts were designed to hold the speakers. They were designed to take up the least amount of space possible while still being stable enough to hold a vibrating speaker for an extended period of time. They were designed similarly to the base, with interlocking acrylic pieces made on the laser cutter and then joined together with a chemical bonding agent. A dimensioned drawing for these pieces is shown on the right. |
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==Speakers== |
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The speakers used currently are Jameco 8 ohm speakers, measuring approximately two inches in diameter. When a 5 volt signal is applied these speakers produce 3.125 watts of power. They are secured into the speakers mounts with epoxy. The flexure attachments are epoxied into the center of the speakers and the flexures are held in place by a set screw which is holding on to a threaded rod that runs into the flexure. These flexures are then attached to the platform with is eight inches across and also made of acrylic. All of the drawing files for these parts can be downloaded here. |
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=Circuit= |
=Circuit= |
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=PIC Code= |
=PIC Code= |
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Revision as of 02:54, 15 June 2009
Overview
The goal of this project was to create a miniature, simplified version of the PPOD (Programmable Part-feeding Oscillatory Device) that is currently in the Laboratory for Intelligent Mechanical Systems. This smaller model needed to be easily transportable so that it could be taken to various locations and shown to different groups. The PPOD is a device that is able to manipulate parts placed on it by creating a velocity field that is dependent on the phases and amplitudes of the speakers that are connected to the platform. More information on the original PPOD and related research can be found at the LIMS website.
Physical Construction
Base
The base for the PPOD-mini is constructed out of acrylic sheets that are approximately 0.22" thick. Each section was designed in AutoCad and then transferred to the Laser cutter to be created. The sections were designed with a jigsaw pattern on the edges so they would fit together tightly and could be placed exactly where desired. The dimension of the base are 10" x 10" x 3.5". The goal was to keep it as small as possible while still making it functional, this width was required to fit all of the speakers and the height was necessary for the power supplies to fit in the enclosed space.
Speaker Mounts
Six speaker mounts were designed to hold the speakers. They were designed to take up the least amount of space possible while still being stable enough to hold a vibrating speaker for an extended period of time. They were designed similarly to the base, with interlocking acrylic pieces made on the laser cutter and then joined together with a chemical bonding agent. A dimensioned drawing for these pieces is shown on the right.
Speakers
The speakers used currently are Jameco 8 ohm speakers, measuring approximately two inches in diameter. When a 5 volt signal is applied these speakers produce 3.125 watts of power. They are secured into the speakers mounts with epoxy. The flexure attachments are epoxied into the center of the speakers and the flexures are held in place by a set screw which is holding on to a threaded rod that runs into the flexure. These flexures are then attached to the platform with is eight inches across and also made of acrylic. All of the drawing files for these parts can be downloaded here.
